Vacuum bottle.



etively movable in response to the difference tuated by. the movable element of the said two relatively movableelements for" eating the movement of the same,

4:. A. speedometer comprising a permanent magnet, a pair of-solenoids of different magnetic'strength mounted to move in response to the difi'erence in their magnetic strength with relation to the said magnet, means forindicating the movement of the said solenoids and means for supplying electric current to the latter.

I v5. Al speedometer comprising a permanent magnet, a pair of solenoids of different magnetic strength mounted to move in response to thediflerence in their magnetic strength With relation tothe said magnet, a scale disk, means for operating the same by the saidsolenolds and means for supplying current to the'latter,

6; A speedometer comprising a fixed permanent ma net a. pair of solenoids movablv mounted with respect to said magnet, means for supplying a constant current to the one solenoid, means for supplying an intermittent current to the other solenoid to increese the strength thereof with respect to the first named solenoid, means for indicat mg the movement of said solenoids and -means forlimiting their movement.

7. A speedometer comprising a fixed permanent magnet of circular form open at the pole, a pair of solenoids of difl'eient magnetic strength, :i lever pivoted centrally of the said magnet and supporting the said two solenoids, an indicating member, means tor operating the same from the said lever, and means for supplying current to the said solenoids to cause the same to move with relation to the saidmagnet and in response to their different magnetic strength Signed at New York, N. Y., this 26th day of June, 1914. v ALLEN A. CANTON.

Witnesses: v

Werner; MARTIN, IVAN KoNIosBERo.

- F. E. CARLSON.

. VACUUM BOTTLE. 7

APPLICATION FILED FEB- !9. 1914.

1,219,246. Patented'Mar.13, 19 17.

WITNESSES; INVENTOR. I My fiederbc/fE: Carlson.

W BY flaw A TTORNE Y.

rm: NORRIS zrms 00., Puomumm. wAsumcmm o. c. 

